Nice words from one of the bloggers:
"
Keep in mind though that FastSCP is faster than WinSCP because FastSCP
doesn’t encrypt the data that is being copied. WinSCP does encrypt the
data and I consider WinSCP to be more secure than FastSCP. FastSCP does
use an SSH control channel though. An SSH control channel can best be
described as a secure channel which is used to pass user/password/port
information. In addition to the ports used for SSH other ports need to
be opened up for FastSCP to work, which increases the attack surface of
the ESX host. Some of you might have security policies in place, this
might be the time to start reading it.
"
Thus, you shouldtake into account the security policies from your organization nd make the right choice.
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iSCSI SAN software
http://www.starwindsoftware.com